<p>(Reuters) - SolarWinds Inc's first-quarter revenue missed analysts' estimates and the network management software maker forecast current-quarter results below expectations as it struggles to sell new licenses.</p><p>SolarWinds shares fell as much as 10 percent in extended trading.</p><p>The company's core products are used by IT professionals and teams in companies to configure, monitor and report on the health and performance of their network, systems, and application infrastructure.</p><p>SolarWinds expects second-quarter adjusted earnings in the range of 37 cents to 38 cents per share on revenue of $77.8 million to $78.8 million.</p><p><a href="http://articles.chicagotribune.com/2013-04-30/business/sns-rt-us-solarwinds-resultsbre93t189-20130430_1_license-revenue-thomson-reuters-i-b-e-s-core-products">Keep reading...</a></p>